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Studying power-grid synchronization with incremental refinement of model heterogeneity.
Chaos
January 2025
Institute of Technical Physics and Materials Science, HUN-REN Centre for Energy Research, P.O. Box 49, H-1525 Budapest, Hungary.
The dynamics of electric power systems are widely studied through the phase synchronization of oscillators, typically with the use of the Kuramoto equation. While there are numerous well-known order parameters to characterize these dynamics, shortcoming of these metrics are also recognized. To capture all transitions from phase disordered states over phase locking to fully synchronized systems, new metrics were proposed and demonstrated on homogeneous models.
View Article and Find Full Text PDFGeneration of Bio-Based, Shape- and Temperature-Stable Three-Dimensional Nonwoven Structures Using Different Polyhydroxyalkanoates.
Polymers (Basel)
December 2024
German Institutes of Textile and Fiber Research (DITF), Koerschtalstr. 26, D-73770 Denkendorf, Germany.
Article Synopsis
- Recent research highlights the potential of polyhydroxyalkanoates (PHAs), especially poly(3-hydroxybutyrate) (P3HB), for creating fine fiber nonwoven structures, with fiber diameters ranging from 2.5 µm to 20 µm through the meltblow process.
- The study identifies limitations in existing PHA fabrics, such as brittleness and low flexibility, but shows how advancements in their processing can lead to stable three-dimensional nonwoven parts.
- It also reveals that the PHA copolymer poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH) demonstrates improved elongation properties and resilience compared to P3HB, especially
Avoiding catastrophic overfitting in fast adversarial training with adaptive similarity step size.
PLoS One
January 2025
School of Electrical Engineering, Zhejiang University, Hangzhou, China.
Adversarial training has become a primary method for enhancing the robustness of deep learning models. In recent years, fast adversarial training methods have gained widespread attention due to their lower computational cost. However, since fast adversarial training uses single-step adversarial attacks instead of multi-step attacks, the generated adversarial examples lack diversity, making models prone to catastrophic overfitting and loss of robustness.
View Article and Find Full Text PDFSupramolecular modification of sustainable high-molar-mass polymers for improved processing and performance.
Nat Commun
January 2025
Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Materials, Laboratory of Macromolecular and Organic Materials, Lausanne, Switzerland.
The plastic waste crisis is among humanity's most urgent challenges. However, widespread adoption of sustainable plastics is hindered by their often inadequate processing characteristics and performance. Here, we introduce a bio-inspired strategy for the modification of a representative high molar mass, biodegradable aliphatic polyester that helps overcome these limitations and remains effective at molar masses far greater than the entanglement molar mass.
View Article and Find Full Text PDFEvaluation of prehospital care for neurotrauma in Iran.
Spinal Cord
December 2024
Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran.
Study Design: Narrative review.
Background: Neurotrauma has a considerable impact on healthcare, the economy, and human resources worldwide. In Iran, young males are especially vulnerable, with road traffic accidents (RTAs) being the major cause.
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